Overview
The STM32L451RCT6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This device operates at a frequency of up to 80 MHz and features a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types. It also includes a full set of DSP instructions and a Memory Protection Unit (MPU) to enhance application security.
The microcontroller is designed for low-power applications, with a power supply range of 1.71 to 3.6 V and an operating temperature range of -40 °C to 85 °C (or up to 125 °C junction temperature). It incorporates high-speed memories, including up to 512 Kbyte of Flash memory and 160 Kbyte of SRAM, along with a Quad SPI Flash memory interface.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memory | Up to 512 KB Flash, 160 KB SRAM (including 32 KB with hardware parity check) |
| Power Supply | 1.71 to 3.6 V |
| Temperature Range | -40 °C to 85 °C (or up to 125 °C junction temperature) |
| Timers | 1x 32-bit, 5x 16-bit (including 1 advanced motor-control timer), 2x low-power 16-bit timers |
| Analog Peripherals | 1x 12-bit ADC (5 Msps), 1x 12-bit DAC, 1x operational amplifier, 2x ultra-low-power comparators |
| Communication Interfaces | 4x I2C, 3x SPI, 3x USART, 1x UART, 1x LPUART, 1x SAI, 1x SDMMC, 1x CAN |
| Capacitive Sensing Channels | Up to 21 channels |
| Power Modes | VBAT mode: 145 nA, Shutdown mode: 22 nA, Standby mode: 106 nA, Stop 2 mode: 2.05 µA (with RTC: 2.40 µA) |
| Package | LQFP 64 10x10x1.4 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), and DSP instructions
- High-speed memories: up to 512 KB Flash, 160 KB SRAM, and Quad SPI Flash memory interface
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparators
- Extensive range of communication interfaces: I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN
- Up to 21 capacitive sensing channels for touchkey, linear, and rotary touch sensors
- Multiple power-saving modes: VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode
- Fast wakeup from Stop mode (4 µs) and brown out reset (BOR)
- RTC with HW calendar, alarms, and calibration
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L451RCT6 is suitable for a wide range of applications that require low power consumption and high performance. These include:
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics and appliances
- Automotive systems and telematics
- IoT and smart home devices
- Energy metering and monitoring systems
Q & A
- What is the core architecture of the STM32L451RCT6?
The STM32L451RCT6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the power supply range for the STM32L451RCT6?
The power supply range is from 1.71 to 3.6 V.
- What are the operating temperature ranges for the STM32L451RCT6?
The operating temperature ranges are -40 °C to 85 °C (or up to 125 °C junction temperature).
- What types of memory does the STM32L451RCT6 have?
The device has up to 512 KB of Flash memory and 160 KB of SRAM, including 32 KB with hardware parity check.
- What are the key analog peripherals of the STM32L451RCT6?
The key analog peripherals include a 12-bit ADC, a 12-bit DAC, an operational amplifier, and two ultra-low-power comparators.
- What communication interfaces are available on the STM32L451RCT6?
The device features I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN interfaces.
- How many capacitive sensing channels does the STM32L451RCT6 support?
The device supports up to 21 capacitive sensing channels.
- What are the power-saving modes available on the STM32L451RCT6?
The device offers VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- What is the typical current consumption in Stop 2 mode with RTC?
The typical current consumption in Stop 2 mode with RTC is 2.40 µA.
- Does the STM32L451RCT6 support any development tools?
Yes, it supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
